They are parallel shaped glass fiber posts with a conical apex used to support restorations and crowns.

Advantages:

- It has high fiber content. (80% glass fiber, 20% epoxy resin by weight)

- Provides high adhesion to the channel.

- Low wear in the apical region.

- It has a standard drill. Full adaptation to the channel is achieved without loss of material.

- Its bending strength is 856 Mpa.

- It has a modulus of elasticity close to dentine. 40 Gpa

- It is radio opaque. It gives excellent radiographic image.

- It is easy to disassemble.

- Fibers arranged longitudinally in the resin matrix provide easy and fast removal.